JP2017226772A - Ink composition for inkjet recording, ink storage container and inkjet recording method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink composition that prevents foreign matter and foam from occurring even when the ink composition is stored in an ink storage container of a shape apt to contact the atmosphere, and has excellent storage stability and discharge stability.SOLUTION: An ink composition for inkjet recording has a disperse dye, a polycarboxylic acid polymer surfactant, an anionic surfactant, and a nonionic surfactant with an HLB value of 5 or less, the content of the nonionic surfactant being 0.01 mass% or more and 0.7 mass% or less relative to the total mass of the ink composition.SELECTED DRAWING: None

Description

  The present invention relates to an ink composition for ink jet recording, an ink container, and an ink jet recording method.

  The ink jet recording method is capable of recording high-definition images with a relatively simple device, and has been rapidly developed in various fields. Among them, various studies have been made on an ink jet recording method using a sublimation transfer ink containing a disperse dye. In the sublimation transfer method, heat is applied to transfer paper printed with sublimation transfer ink to disperse the disperse dye, and a fabric such as polyester adhered to the transfer paper is dyed. This sublimation transfer method gives a bright and bright image of the dye while leaving the texture of the fabric itself, and is excellent in scratch resistance and water resistance. Therefore, it is a banner, tapestry, banner, T-shirt, uniform, etc. It is used for many purposes.

  By the way, in the ink composition containing the disperse dye, the disperse dye may be slightly dissolved in the solvent contained in the ink composition. When this dissolved disperse dye reprecipitates due to heat change, etc., it becomes a foreign matter (hereinafter also referred to as “foreign matter derived from disperse dye”), resulting in clogging of the nozzle and impairing the discharge stability of the nozzle. was there.

  On the other hand, in recent years, with the increase in the recording amount by the ink jet recording apparatus, the ink consumption has increased, and the cartridge replacement frequency tends to increase. In order to reduce the replacement frequency of the cartridge, attempts have been made to increase the size of the cartridge, or to replenish ink in a large ink tank instead of replacing the cartridge.

  However, when an ink composition containing a disperse dye is filled, for example, in an air-opening ink tank, foreign matter (hereinafter also referred to as “foreign matter derived from the gas-liquid interface”) may be generated at the gas-liquid interface. In some cases, the discharge stability of the nozzles may be impaired.

  Under such circumstances, in order to improve the storage stability of an ink composition containing a disperse dye, a technique for adding an anionic surfactant to an ink composition containing a disperse dye has been disclosed (for example, Patent Documents). 1 and Patent Document 2).

JP 2003-128962 A JP 08-325472 A

  However, in the techniques disclosed in Patent Document 1 and Patent Document 2, bubbles are easily mixed in the ink composition because the foaming property of the anionic surfactant is high. When the bubbles are supplied to the head together with the ink composition, there is a problem in that pressure loss occurs and dots cannot be ejected normally. In particular, in recent piezo heads with high-density nozzles, small-sized bubbles that have not been problematic until now cannot be discharged out of the head during cleaning or the like and remain in the head, resulting in ejection failure. There was a problem.

  Accordingly, some aspects of the present invention solve at least a part of the above-described problems, so that even if the ink composition is stored in an ink storage container having a shape that easily contacts the atmosphere, The present invention provides an ink composition for ink jet recording, which can suppress the generation of foreign substances derived from dyes, foreign substances derived from a gas-liquid interface, and bubbles, and is excellent in ink storage stability and ejection stability.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following aspects or application examples.

[Application Example 1]
One aspect of the ink composition for inkjet recording according to the present invention is:
A disperse dye, a polycarboxylic acid-based polymer surfactant, an anionic surfactant, and a nonionic surfactant having an HLB value of 5 or less,
The content of the nonionic surfactant is 0.01% by mass or more and 0.7% by mass or less with respect to the total mass of the ink composition.

  According to the ink composition for ink-jet recording of Application Example 1 (hereinafter, also simply referred to as “ink composition”), the generation of foreign matter due to the disperse dye being dissolved and reprecipitated in the ink composition is suppressed, Even when the ink composition is stored in an ink container having a shape that easily comes into contact with the atmosphere, the generation of foreign matter at the gas-liquid interface of the ink composition can be suppressed, so that the storage stability is improved. . In addition, since the generation of bubbles can be suppressed, the ejection stability is improved.

[Application Example 2]
In the ink composition for ink jet recording of Application Example 1, the disperse dye may have a sublimation property with a molecular weight of 380 or less.

  When the disperse dye has a sublimation property with a molecular weight of 380 or less, the dye can be efficiently transferred to the transfer destination. On the other hand, when the molecular weight of the disperse dye is 380 or less, the disperse dye is easily dissolved in a solvent or the like in the ink composition, and appears as a foreign matter when it is reprecipitated due to a heat change or the like. However, according to the ink composition for ink jet recording of Application Example 2, the solubility of the disperse dye can be lowered, so that the generation of foreign matters due to reprecipitation of the disperse dye can be effectively suppressed.

[Application Example 3]
In the ink composition for ink jet recording according to Application Example 1 or Application Example 2, the anionic surfactant may be sodium polyoxyethylene alkyl ether sulfate.

  According to the ink composition for ink jet recording of Application Example 3, even when the ink composition is stored in an ink storage container having a shape that easily comes into contact with the atmosphere, the generation of foreign matters at the gas-liquid interface is effectively suppressed. can do.

[Application Example 4]
In the ink composition for ink jet recording according to any one of Application Examples 1 to 3, the nonionic surfactant may be acetylene glycol having a main chain having 10 or more carbon atoms.

[Application Example 5]
In the ink composition for inkjet recording of Application Example 4, the acetylene glycol is 2,5,8,11-tetramethyl-6-dodecin-5,8-diol, 5,8-dimethyl-6-dodecin-5, At least one selected from the group consisting of 8-diol, 2,4,7,9-tetramethyl-5-decyne-4,7-diol and 4,7-dimethyl-5-decyne-4,7-diol Can be.

  According to the ink composition for ink jet recording of Application Example 4 or Application Example 5, since the generation of bubbles can be effectively suppressed, even if the shape of the nozzle hole is disadvantageous for the discharge or movement of bubbles, it is satisfactory. Discharge stability can be secured.

[Application Example 6]
In the ink composition for ink jet recording according to any one of Application Examples 1 to 5, the amount of the anionic surfactant and the nonionic surfactant is 1: 0.02 to 1: 1 on a mass basis. Ratios can be included.

  According to the ink composition for ink jet recording of Application Example 6, it is possible to more effectively suppress the generation of foreign matters and the generation of bubbles due to the disperse dye being dissolved and reprecipitated in the ink composition. Further, the storage stability and ejection stability of the ink composition are further improved.

[Application Example 7]
The ink composition for ink jet recording according to any one of Application Examples 1 to 6 can be stored in an ink storage container and used.

  According to the ink composition for ink jet recording of Application Example 7, since the generation of foreign matter (foreign matter originating from the gas-liquid interface) can be suppressed even when the ink composition is contained in an ink containing container, Storage stability and ejection stability are improved.

[Application Example 8]
One aspect of the ink container according to the present invention is:
An ink container for housing the ink composition according to any one of Application Examples 1 to 7, wherein the ink container has a gas-liquid interface.

  Even in the ink storage container of Application Example 8 (for example, an air-opening ink tank in which a gas-liquid interface is generated when the ink composition is stored), the ink composition is a foreign matter derived from the gas-liquid interface. Therefore, the storage stability and ejection stability of the ink composition are improved.

[Application Example 9]
One aspect of the inkjet recording method according to the present invention is:
Recording is performed by discharging the ink composition of any one of Application Examples 1 to 7 from a recording head.

  According to the ink jet recording method of Application Example 9, since the ink composition in which the generation of foreign matters derived from disperse dyes, foreign matters derived from the gas-liquid interface and bubbles is suppressed is used, ink jet recording excellent in ink ejection stability is realized. it can.

[Application Example 10]
In the inkjet recording method of application example 9,
The recording head has a nozzle hole for discharging the ink composition, and the nozzle hole has a portion in which a cross-sectional area perpendicular to the discharge direction of the ink composition decreases discontinuously toward the discharge direction. Can have.

  When the nozzle hole has the shape as described above, the meniscus of the ink composition can be stably formed even when high-speed printing is performed at a printing speed of 70 ppm (page per minute) or more. On the other hand, if the nozzle hole has a reduced portion whose diameter changes discontinuously, the streamline is likely to be disturbed when the ink composition flows in the reduced portion. For this reason, when bubbles are generated in the ink composition, the bubbles remain in the head, so that ejection failure is likely to occur. However, according to the ink jet recording method of Application Example 10, since the generation of bubbles can be effectively suppressed, even if the shape of the nozzle hole is disadvantageous for the discharge or movement of bubbles as described above, good ejection Stability can be secured.

Sectional drawing which shows an example of the nozzle hole of a nozzle plate typically. FIG. 3 is a perspective view illustrating an example of an ink jet recording apparatus in which an ink container is mounted. FIG. 5 is a perspective view illustrating an example of a state where a slider is separated from an ink container. FIG. 3 is an exploded perspective view illustrating an example of an ink storage container. The side view which shows typically the state with which the film was mounted | worn to the container case. Sectional drawing which shows an example of an ink storage container typically.

  Several embodiments of the present invention will be described below. Embodiment described below demonstrates an example of this invention. The present invention is not limited to the following embodiments, and includes various modifications that are implemented without departing from the scope of the present invention. Note that not all of the configurations described below are essential configurations of the present invention.

1. Ink composition for ink jet recording The ink composition for ink jet recording according to this embodiment includes a disperse dye, a polycarboxylic acid-based polymer surfactant, an anionic surfactant, and a nonionic interface having an HLB value of 5 or less. The nonionic surfactant is contained in an amount of 0.01% by mass or more and 0.7% by mass or less based on the total mass of the ink composition. Hereinafter, components and applications that can be included in the ink composition according to the present embodiment will be described in detail.

1.1. Disperse dye The ink composition according to this embodiment contains a disperse dye. The disperse dye is a dye suitably used for dyeing hydrophobic synthetic fibers such as polyester, nylon, and acetate, and is a compound insoluble or hardly soluble in water.

  Although it does not restrict | limit especially as a disperse dye used for the ink composition which concerns on this embodiment, Specifically, what is illustrated below is mentioned.

Examples of red disperse dyes include C.I. I. Disperse thread 1, 4, 5, 7, 11, 12, 13, 15, 17, 27, 43, 44, 50, 52, 53, 54, 55, 56, 58, 59, 60, 65, 72, 73, 74, 75, 76, 78, 81, 82, 86, 88, 90, 91, 92, 93, 96, 103, 105, 106, 107, 108, 110, 111, 113, 117, 118, 121, 122, 126, 127, 128, 131, 132, 134, 135, 137, 143, 145, 146, 151, 152, 153, 154, 157, 159, 164, 167, 169, 177, 179, 181, 183, 184, 185, 188, 189, 190, 191, 192, 200, 201, 202, 203, 205, 206, 207, 210, 221, 224, 225, 2 7,229,239,240,257,258,277,278,279,281,288,298
302, 303, 310, 311, 312, 320, 324, 328 and the like.

  Examples of yellow disperse dyes include C.I. I. Disperse Yellow 3, 4, 5, 7, 8, 9, 13, 23, 24, 30, 33, 34, 39, 42, 44, 49, 50, 51, 54, 56, 58, 60, 63, 64 , 66, 68, 71, 74, 76, 79, 82, 83, 85, 86, 88, 90, 91, 93, 98, 99, 100, 104, 108, 114, 116, 118, 119, 122, 124 126, 135, 140, 141, 149, 160, 162, 163, 164, 165, 179, 180, 182, 183, 184, 186, 192, 198, 199, 202, 204, 210, 211, 215, 216 218, 224, 227, 231, 232 and the like.

  Examples of the orange disperse dye include C.I. I. Disperse Orange 1, 3, 5, 7, 11, 13, 17, 20, 21, 25, 29, 30, 31, 32, 33, 37, 38, 42, 43, 44, 45, 46, 47, 48 49, 50, 53, 54, 55, 56, 57, 58, 59, 61, 66, 71, 73, 76, 78, 80, 89, 90, 91, 93, 96, 97, 119, 127, 130 139, 142, and the like.

  Examples of blue disperse dyes include C.I. I. Disperse Blue 3, 7, 9, 14, 16, 19, 20, 26, 27, 35, 43, 44, 54, 55, 56, 58, 60, 62, 64, 71, 72, 73, 75, 79 81, 82, 83, 87, 91, 93, 94, 95, 96, 102, 106, 108, 112, 113, 115, 118, 120, 122, 125, 128, 130, 139, 141, 142, 143 146, 148, 149, 153, 154, 158, 165, 167, 171, 173, 174, 176, 181, 183, 185, 186, 187, 189, 197, 198, 200, 201, 205, 207, 211 214, 224, 225, 257, 259, 267, 268, 270, 284, 285, 287, 288, 291, 293, 295, 297, 01,315,330,333,359, and the like.

  Examples of the violet disperse dye include C.I. I. Disperse violet 1, 4, 8, 17, 23, 26, 27, 28, 31, 33, 35, 36, 38, 40, 43, 46, 48, 50, 51, 52, 56, 57, 59, 61 63, 69, 77, and the like. Examples of the green disperse dye include C.I. I. Disperse Green 9 etc. are mentioned. Examples of brown disperse dyes include C.I. I. Disperse brown 1, 2, 4, 9, 13, 19 etc. are mentioned. Examples of black disperse dyes include C.I. I. Disperse black 1, 3, 10, 24 etc. are mentioned.

  The disperse dyes exemplified above may be used singly or as a mixed color combining two or more.

  When the ink composition according to this embodiment is used as a sublimation transfer ink, among the disperse dyes exemplified above, a disperse dye having a sublimation property with a molecular weight of 380 or less is preferable. The molecular weight of the disperse dye having sublimation property is preferably 340 or less, more preferably 270 or more and 340 or less, and particularly preferably 280 or more and 340 or less. Here, “having sublimation” means having a property of sublimation by heating. When the disperse dye has a molecular weight of 380 or less and has a sublimation property, the dye can be efficiently transferred to the transfer destination. On the other hand, when the molecular weight of the disperse dye is 380 or less, the disperse dye is easily dissolved in a solvent or the like in the ink composition, and appears as a foreign matter when it is reprecipitated due to a heat change or the like. However, according to the ink composition for ink jet recording according to the present embodiment, the generation of foreign matters due to reprecipitation of the disperse dye can be effectively suppressed by the action of the polycarboxylic acid polymer surfactant.

  Examples of the disperse dye having a sublimation property having a molecular weight of 380 or less include C.I. I. Disperse thread 11, 53, 55, 59, 60; C.I. I. Disperse yellow 3, 7, 8, 23, 39, 51, 54, 60, 71; C.I. I. Disperse orange 1, 20, 25; C.I. I. Disperse blue 19, 26, 56, 72, 81, 359; C.I. I. Disperse violet 8, 17, 27, 28 etc. are mentioned. These may be used alone or in combination of two or more.

  The disperse dyes exemplified above are all insoluble or sparingly soluble in water, but can be dispersed well in the ink composition by the polycarboxylic acid polymer surfactant described later, and the disperse dyes The generation of foreign matter due to reprecipitation of can be effectively suppressed.

  The content of the disperse dye is 10% by mass or less, preferably 0.1% by mass or more and 10% by mass or less, more preferably 0.2% by mass or more and 9.0% by mass with respect to 100% by mass of the ink composition. %, Particularly preferably 0.3% by mass or more and 8.0% by mass or less.

  When the content of the disperse dye is 0.1% by mass or more, the coloring property (OD value) of the dyed product (transfer destination) obtained tends to be more excellent. Moreover, when the content of the disperse dye is 10% by mass or less, the ejection stability tends to be further improved.

1.2. Polycarboxylic acid-based polymer surfactant The ink composition according to this embodiment contains a polycarboxylic acid-based polymer surfactant. This polycarboxylic acid-based polymer surfactant can effectively suppress not only the function of dispersing the above-mentioned disperse dye in the ink composition but also the generation of foreign matters due to reprecipitation of the disperse dye. When the polycarboxylic acid-based polymer surfactant is adsorbed on the surface of the disperse dye particles, the dispersion of the disperse dye in the ink composition is stabilized by the electrostatic repulsion effect derived from the carboxy group and the steric hindrance of the polymer. Improves. Further, when the surface of the disperse dye particle is protected by the polycarboxylic acid-based polymer surfactant, the disperse dye ink composition can be prevented from coming into contact with the solvent in the ink composition. It is thought that the solubility in the inside becomes small. It is speculated that this action can suppress the generation of foreign matter due to reprecipitation of the disperse dye.

  The polycarboxylic acid-based polymer surfactant is a polymer mainly composed of unsaturated carboxylic acid among monomers constituting the polymer, and may be a homopolymer or copolymerized with unsaturated carboxylic acid. It may be a copolymer with a possible monomer, or may be a homopolymer or a salt of the copolymer (a salt neutralized with an alkali metal). Here, “mainly” means that the polymerization molar ratio of the carboxylic acid monomer in the polycarboxylic acid polymer is 50 mol% or more.

  Examples of the unsaturated carboxylic acid include, but are not limited to, acrylic acid, methacrylic acid, maleic acid, fumaric acid, and itaconic acid. Among these, acrylic acid and maleic acid are preferable, and acrylic acid is more preferable because generation of foreign matters due to reprecipitation of the disperse dye can be effectively suppressed.

  The monomer copolymerizable with the unsaturated carboxylic acid is not limited to the following, but examples thereof include the above unsaturated carboxylic acid, unsaturated carboxylic acid amide of unsaturated carboxylic acid and ammonia or organic amine, and unsaturated sulfone. Examples include acids and hydrophobic monomers. Among these, since it is easy to control the dispersibility of the polycarboxylic acid-based polymer surfactant, an unsaturated carboxylic acid amide is preferable, and among them, an acrylic acid amide is more preferable. When the polycarboxylic acid polymer is an acrylic acid-acrylic acid amide copolymer, the acid value is preferably 20 to 100, and the amine value is preferably 10 to 30.

  The weight average molecular weight of the polycarboxylic acid-based polymer surfactant may be in the range of 1,500 to 30,000, and is excellent in dispersibility in the ink composition, and is in the range of 2,000 to 20,000. It is preferable that

  Examples of commercially available polycarboxylic acid-based polymer surfactants include Poise 520, 521, 530, 535, 540, Demol P, Demol EP, Demol ST (above, manufactured by Kao Corporation), Aron A-6330, Aron A-6410 (above, Toagosei Co., Ltd.) etc. are mentioned.

  A polycarboxylic acid type | system | group polymeric surfactant may be used individually by 1 type, and may be used in combination of 2 or more type.

  The content (solid content) of the polycarboxylic acid-based polymer surfactant is preferably 0.1% by mass or more and 5.0% by mass or less, more preferably 0.00% by mass with respect to 100% by mass of the ink composition. It is 5 mass% or more and 4.0 mass% or less, Especially preferably, they are 1.0 mass% or more and 3.0 mass% or less. When the content of the polycarboxylic acid-based polymer surfactant is within the above range, the above-mentioned disperse dye can be dispersed well in the ink composition, and the generation of foreign matters due to reprecipitation of the disperse dye is effective. Can be suppressed.

1.3. Anionic Surfactant The ink composition according to this embodiment contains an anionic surfactant. In addition, although the above-mentioned polycarboxylic acid polymer surfactant is one kind of anionic surfactant, the concept of “anionic surfactant” in the present invention includes the above-mentioned polycarboxylic acid polymer interface. Activators are not included.

  When an ink container containing an ink inlet that can be replenished with an ink composition (that is, an ink container having a shape in which the ink composition is easily in contact with the atmosphere) is filled with an ink composition containing a disperse dye, There is a tendency for foreign matter to be generated at the gas-liquid interface. Therefore, it is presumed that by adding an anionic surfactant to the ink composition, the anionic surfactant is oriented to the gas-liquid interface, so that the generation of foreign matters at the gas-liquid interface can be inhibited.

  The anionic surfactant is not particularly limited, and examples thereof include alkyl sulfocarboxylates, α-olefin sulfonates, polyoxyethylene alkyl ether acetates, N-acyl amino acids and salts thereof, and N-acylmethyl taurate salts. , Alkyl sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl ether phosphate, rosin acid soap, castor oil sulfate ester, lauryl alcohol sulfate ester, alkylphenol type phosphate ester, alkyl type phosphate ester, Alkyl diphenyl ether sulfonate, alkyl aryl sulfonate, dialkyl sulfo oxalate and the like can be mentioned. Among these, alkyl diphenyl ether sulfonate, alkyl aryl sulfonate, polyoxyethylene alkyl ether sulfate, and alkyl sulfate are preferable, polyoxyethylene alkyl ether sulfate is more preferable, and polyoxyethylene alkyl ether sodium sulfate is particularly preferable. preferable.

  Examples of commercially available anionic surfactants include Perex SS-H, SS-L, Latem WX, E-150, Neoperex GS, G-15, G-25, and G-35 (all manufactured by Kao Corporation). ) And the like.

  An anionic surfactant may be used individually by 1 type, and may be used in combination of 2 or more type.

  The content of the anionic surfactant is preferably 0.01% by mass or more and 1.0% by mass or less, and more preferably 0.05% by mass or more and 0.9% by mass with respect to 100% by mass of the ink composition. % Or less, particularly preferably 0.1% by mass or more and 0.8% by mass or less. When the content of the anionic surfactant is within the above range, the generation of foreign matters at the gas-liquid interface can be suppressed while the foamability of the ink composition is reduced.

1.4. Nonionic Surfactant The ink composition according to this embodiment contains a nonionic surfactant having an HLB value of 5 or less. As described above, an anionic surfactant is an essential component in order to suppress the generation of foreign substances at the gas-liquid interface. However, since this anionic surfactant has a high foaming property, for example, when an ink composition is refilled in an ink container equipped with an ink inlet capable of refilling ink, bubbles easily form in the head together with the ink. If supplied, pressure loss may occur and dots may not be ejected normally. Therefore, by adding a nonionic surfactant having an HLB value of 5 or less to the ink composition, the generation of bubbles is suppressed, so that the ejection stability is improved.

  The HLB value of the nonionic surfactant contained in the ink composition according to the present embodiment may be 5 or less, preferably 2 or more and 4 or less, particularly preferably 3 or more and 4 or less. . When the HLB value is within the above range, the generation of bubbles in the ink composition can be suppressed. Thereby, the initial filling property and the ejection stability are excellent. On the other hand, if the HLB value is more than 5, the generation of bubbles may not be suppressed, and the effect of defoaming the generated bubbles is not excellent. Here, the HLB value is an HLB value defined by the Griffin method.

  The nonionic surfactant having an HLB value of 5 or less is not particularly limited, and examples thereof include acetylene glycol surfactants and silicon surfactants. Among these, since generation of bubbles can be effectively suppressed, acetylene glycol surfactants are preferable, acetylene glycols having 10 or more carbon atoms in the main chain are more preferable, solubility in ink, and ink viscosity. In view of the above, acetylene glycol having 10 to 40 carbon atoms in the main chain is even more preferable, and acetylene glycol having 10 to 30 carbon atoms in the main chain is particularly preferable.

（上記一般式（１）中、Ｒ^１、Ｒ^１’、Ｒ^２、及びＲ^２’は互いに独立して炭素数１〜５のアルキル基を表し、主鎖の炭素数は１０以上である。） The acetylene glycol having 10 or more carbon atoms in the main chain is not particularly limited, and examples thereof include acetylene glycol represented by the following general formula (1).

(In the general formula (1), R ¹ , R ^{1 ′} , R ² , and R ^{2 ′} each independently represent an alkyl group having 1 to 5 carbon atoms, and the main chain has 10 or more carbon atoms. )

  Specific examples of the acetylene glycol having 10 or more carbon atoms in the main chain include, but are not limited to, 2,5,8,11-tetramethyl-6-dodecyne-5,8-diol, 5,8-dimethyl- Preferred examples include 6-dodecin-5,8-diol, 2,4,7,9-tetramethyl-5-decyne-4,7-diol and 4,7-dimethyl-5-decyne-4,7-diol. .

  The commercial product of acetylene glycol having a main chain having 10 or more carbon atoms is not limited to the following, but, for example, Surfynol 104 (2,4,7,9-tetramethyl-5-decyne-4,7-diol) Surfynol DF110D (2,5,8,11-tetramethyl-6-dodecyne-5,8-diol) (manufactured by Air Products).

  Examples of the silicon surfactant include polysiloxane compounds and polyether-modified organosiloxanes. Although it does not specifically limit as a commercial item of a silicon type surfactant, KF-945, KF-6015, KF-6016, KF-6017, KF-6028, KF-6038 (above, Shin-Etsu Silicone Co., Ltd. make) etc. Can be mentioned.

  Nonionic surfactants having an HLB value of 5 or less may be used singly or in combination of two or more.

  The content of the nonionic surfactant having an HLB value of 5 or less is 0.01% by mass or more and 0.7% by mass or less, preferably 0.05% by mass or more, with respect to 100% by mass of the ink composition. It is 0.6 mass% or less, Most preferably, it is 0.1 mass% or more and 0.5 mass% or less. When the content of the nonionic surfactant having an HLB value of 5 or less is within the above range, the generation of bubbles in the ink composition can be suppressed, so that the initial filling property and ejection stability are excellent. Become. When the content of the nonionic surfactant having an HLB value of 5 or less is less than 0.01% by mass, the effect of suppressing the generation of foaming in the ink composition is low, and when it exceeds 0.7% by mass, the hydrophobic property is decreased. High nonionic surfactants may dissolve the disperse dye, which may cause foreign matter due to reprecipitation of the disperse dye.

  In the ink composition according to the present embodiment, the amount ratio of the anionic surfactant to the nonionic surfactant having an HLB value of 5 or less is based on mass (anionic surfactant: nonionic having an HLB value of 5 or less. Surfactant =) 1: 0.02 to 1: 1 is preferable, 1: 0.05 to 1: 0.8 is more preferable, and 1: 0.1 to 1: 0.6. It is particularly preferred that When the amount ratio of the anionic surfactant to the nonionic surfactant having an HLB value of 5 or less is within the above range, the generation of foreign matters due to the disperse dye being dissolved in the ink composition and reprecipitation, Since the generation of bubbles can be more effectively suppressed, the storage stability and ejection stability of the ink composition are further improved.

1.5. Other Components The ink composition according to this embodiment can appropriately contain water, a water-soluble organic solvent, and other additives.

<Water>
The ink composition according to this embodiment may contain water. Although it does not specifically limit as water, For example, it is preferable to use pure water, such as ion-exchange water, ultrafiltration water, reverse osmosis water, distilled water, or ultrapure water. In particular, water obtained by sterilizing these waters by ultraviolet irradiation or addition of hydrogen peroxide tends to prevent the generation of mold and bacteria over a long period of time.

  The content of water is preferably 50% by mass or more and 90% by mass or less, and more preferably 55% by mass or more and 85% by mass or less with respect to 100% by mass of the ink composition.

<Water-soluble organic solvent>
The ink composition according to this embodiment may further contain one or more water-soluble organic solvents. By containing a water-soluble organic solvent, it effectively suppresses the evaporation of moisture from the head when left for a long time, and improves the wettability of the ink composition by improving the wettability to the intermediate recording medium. And clogging recovery tend to be further improved. As such a water-soluble organic solvent, a compound used as a water-soluble organic solvent in a normal ink can be used, and examples thereof include polyol compounds, glycol ethers, sugars, and betaine compounds. Among these, a diol compound or a glycol ether is preferable, and more preferably, an alkanediol or 1,2-alkanediol having a hydroxyl group at both ends having 2 to 6 carbon atoms in the molecule, A glycol ether having 12 or less carbon atoms. Since such a water-soluble organic solvent is excellent in dispersion stability of the disperse dye by the dispersant of the present invention, it does not generate agglomerated foreign matter derived from the disperse dye, and is highly compatible with nonionic surfactants having an HLB of 5 or less. For this reason, it is easy to contain the nonionic surfactant in the ink, and the ink has excellent storage stability.

  Examples of the polyol compound include a polyol compound (preferably a diol compound) having 2 to 6 carbon atoms in the molecule and having one ether bond in the molecule. Specific examples include glycerin, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol. 2,3-butanediol, 3-methyl-1,3-butanediol, 1,2-pentanediol, 1,5-pentanediol, 2-methyl-2,4-pentanediol, 3-methyl-1, Examples include 5-pentanediol, 1,2-hexanediol, and 1,6-hexanediol.

  As the glycol ether, for example, a monoalkyl ether of glycol selected from ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol and tripropylene glycol is preferable. More specifically, triethylene glycol monomethyl ether, triethylene glycol monobutyl ether, dipropylene glycol monopropyl ether and the like can be preferably exemplified.

  Saccharides refer to monosaccharides, disaccharides, oligosaccharides (including trisaccharides and tetrasaccharides), and polysaccharides. Examples of sugars include threose, erythrulose, erythrose, arabinose, ribulose, ribose, xylose, xylulose, lyxose, glucose, fructose, mannose, idose, sorbose, gulose, talose, tagatose, galactose, allose, psicose, altrose, maltose. , Isomaltose, cellobiose, lactose, sucrose, trehalose, isotrehalose, gentiobiose, melibiose, tulanose, sophorose, isosaccharose, glucan, fructan, mannan, xylan, galacturonan, mannuronan, N-acetylglucosamine polymer, etc. Heteroglycans such as glycans and triheteroglycans, maltotriose, isomalttriose , Panose, maltotetraose, maltopentaose and the like, preferably trehalose can be exemplified.

  A betaine compound is a compound that has a positive charge and a negative charge at non-adjacent positions in the same molecule, and has no positively charged hydrogen atoms bonded to dissociable hydrogen atoms, so that the molecule as a whole has no charge. (Inner salt). Preferred betaine compounds are N-alkyl substituted amino acids, more preferably N-trialkyl substituted amino acids. Examples of the betaine compound include trimethylglycine (also referred to as “glycine betaine”), γ-butyrobetaine, homarine, trigonelline, carnitine, homoserine betaine, valine betaine, lysine betaine, ornithine betaine, alanine betaine, stachydrine, and glutamate betaine. Preferably, trimethylglycine can be exemplified.

The content of the water-soluble organic solvent is preferably 1% by mass or more and 40% by mass or less, and more preferably 5% by mass or more and 30% by mass or less with respect to 100% by mass of the ink composition. When the content of the water-soluble organic solvent is within the above range, the wettability to the intermediate transfer medium is improved and the ink composition is more permeable while effectively suppressing moisture evaporation from the head when left for a long period of time. Excellent, discharge stability and clogging recovery tend to be further improved.

<Other additives>
The ink composition according to the present embodiment may further include an antiseptic / antifungal agent, an antioxidant, an ultraviolet absorber, a chelating agent, an oxygen absorbent, and a pH adjuster (for example, triethanolamine, adipic acid, water, if necessary) Potassium oxide), a solubilizing agent, and other various additives that can be used in ordinary inks may be included. In addition, various additives may be used individually by 1 type, and may use 2 or more types together.

1.6. Physical Properties of Ink Composition The ink composition according to this embodiment has a surface tension at 20 ° C. of 10 mN / m or more and 40 mN / m from the viewpoint of the balance between recording quality and reliability as an ink for ink jet recording. Is more preferably 15 mN / m or more and 40 mN / m or less, and particularly preferably 25 mN / m or more and 40 mN / m or less. The surface tension is measured by using an automatic surface tension meter CBVP-Z (manufactured by Kyowa Interface Science Co., Ltd.) by confirming the surface tension when the platinum plate is wet with ink in an environment of 20 ° C. can do.

  From the same viewpoint, the viscosity of the ink composition at 20 ° C. is preferably 2 mPa · s or more and 15 mPa · s or less, more preferably 2 mPa · s or more and 7 mPa · s or less, and more preferably 2 mPa · s or more. It is particularly preferably 5 mPa · s or less. The viscosity is measured by using a viscoelasticity tester MCR-300 (manufactured by Pysica), increasing the Shear Rate to 10 to 1000 in an environment of 20 ° C., and reading the viscosity at Shear Rate 200. Can be measured.

1.7. Use of Ink Composition The ink composition according to the present embodiment can be stored in an ink storage container having an ink inlet that can be replenished with the ink composition. The ink storage container can be used by being mounted on an ink jet recording apparatus having a recording head having a nozzle hole for discharging the ink composition. In an ink container having an ink inlet that can be replenished with such an ink composition, the filled ink composition is always in contact with air, so that foreign matter is likely to be generated at the gas-liquid interface. However, according to the ink composition according to the present embodiment, the anionic surfactant is oriented at the gas-liquid interface, whereby the generation of foreign matters at the gas-liquid interface can be suppressed.

  On the other hand, when an anionic surfactant is added to the ink composition, bubbles are easily generated in the ink composition because the anionic surfactant has a high foaming property. However, according to the ink composition of the present embodiment, the generation of bubbles in the ink composition can be suppressed by adding a predetermined amount of a nonionic surfactant having an HLB value of 5 or less. By such a mechanism, the ink composition according to the present embodiment has good storage stability and ejection stability. From the above, when the ink composition includes an ink container that easily comes into contact with the atmosphere as in the ink jet recording apparatus exemplified below, the above-described effects are remarkably exhibited.

<Example of inkjet recording apparatus>
The ink jet recording apparatus of this embodiment includes at least a recording head. Further, the ink jet recording apparatus can be equipped with an ink storage container described later. Accordingly, the ink composition stored in the ink storage container can be ejected from the recording head and adhered to a predetermined medium.

  As the ink jet recording apparatus, either a serial type ink jet recording apparatus or a line type ink jet recording apparatus can be used. In any type of ink jet recording apparatus, a recording head is mounted, and a droplet of an ink composition is discharged from a nozzle hole of the recording head while changing the relative positional relationship between the medium and the recording head. And a predetermined volume (mass), and the ink composition is adhered to the recording surface of the medium to form a predetermined image.

  The method of the ink jet recording apparatus is not particularly limited as long as the ink composition can be ejected as droplets from the nozzle holes of the recording head so that the droplets adhere to the medium. For example, as an ink jet recording method, an electrostatic suction method, a method of ejecting ink droplets by pump pressure, a method of using a piezoelectric element, a method of heating and foaming an ink liquid with a microelectrode, and ejecting ink droplets can be exemplified. .

  In addition to the recording head, the ink jet recording apparatus appropriately includes configurations of an apparatus housing, a carriage mechanism of the recording head, rollers, various driving units, various control units, sensors, a medium transport mechanism, a tray, an operation panel, and the like. it can.

(Recording head)
The recording head has an ink introduction port for introducing the ink composition, a mechanism for discharging the ink composition, and a nozzle hole for discharging the ink composition. The ink introduction port can be connected to an ink container described later, and the ink composition in the ink container is introduced into the recording head. The mechanism for ejecting the ink composition is, for example, a pressure chamber whose internal volume is changed by a piezo element, and is a mechanism that can apply pressure to the ink composition. Then, the ink composition to which pressure is applied in the pressure chamber is ejected from the nozzle hole to a predetermined medium.

  The recording head can be composed of a plurality of members such as a nozzle plate, a pressure chamber forming substrate, a piezo substrate, an ink flow path forming substrate, and a sub tank. The nozzle hole can be formed in, for example, a nozzle plate.

  The nozzle holes can circulate the ink composition in the ejection direction. Further, the nozzle hole is a flow path that is narrower than the pressure chamber so that the ink composition pressurized in the pressure chamber can be easily ejected as droplets.

  The shape of the nozzle hole is not particularly limited, but may be a columnar shape, a truncated cone shape, an elliptical columnar shape, a prismatic shape, a truncated pyramid shape extending in the ink composition ejection direction, or a combination of these shapes.

  When the nozzle plate is made of metal, the nozzle hole can be formed by punching the nozzle plate with a punch, for example. Further, when the nozzle plate is silicon, it can be formed by anisotropic etching using an etching mask and an etchant, for example. When silicon is selected as the material for the nozzle plate and the nozzle holes are formed by anisotropic etching, the accuracy of the nozzle hole shape is higher than when the nozzle holes are formed, and when forming a plurality of nozzle holes. The nozzle hole can be formed with a narrow interval. Therefore, in order to increase the resolution of the recording head, it is preferable to use silicon as the nozzle plate material.

When silicon is selected as the material of the nozzle plate and the nozzle holes are formed by anisotropic etching, the shape of the nozzle holes can be changed using, for example, two cylinders having different diameters by utilizing the action of anisotropic etching. It may be a stacked shape. That is, it may be a columnar shape on the pressure chamber side of the nozzle hole and a columnar shape having a smaller diameter on the tip side of the nozzle hole than on the pressure chamber side. In such a case, a portion where the diameter changes discontinuously may be formed in the connecting portion of the two cylinders without being tapered. In other words, the nozzle hole may have a shape in which a cross-sectional area perpendicular to the ink composition ejection direction has a portion that discontinuously decreases toward the ink composition ejection direction. Although a cylinder is illustrated here, it is also possible to have a prismatic shape. In this case as well, the nozzle hole has a cross-sectional area perpendicular to the ink composition ejection direction. In some cases, the shape has a portion that is discontinuously reduced toward.

  Further, for example, in order to stably manufacture the nozzle plate, it is preferable that the thickness of the nozzle plate is 50 μm or more. In such a case, the nozzle hole has a shape having the above-described discontinuously reducing portion. It is preferable to do. By reducing the diameter of the nozzle hole on the side where the ink composition is ejected, the ejection speed of the ink composition droplets can be increased. On the other hand, if the diameter of the nozzle hole is simply reduced so that it does not have a portion that discontinuously shrinks, the flow path resistance of the nozzle hole may become too large. Therefore, by adopting a shape having a portion that discontinuously shrinks, it is possible to obtain the speed of ink droplets that stably reach the recording medium and to obtain an appropriate flow path resistance.

  FIG. 1 is a cross-sectional view schematically showing an example of such a nozzle hole. In the example of FIG. 1, the nozzle hole 2 is formed in the nozzle plate 1, and the reduced portion 3 that is discontinuously reduced toward the ink composition ejection direction 4 is formed near the center of the nozzle plate 1 in the thickness direction. Yes. In the nozzle hole 2 having the shape of the reduced portion 3 that discontinuously reduces as in the example of FIG. 1, for example, even when printing at a high printing speed of 70 ppm (Page per minute) or higher, the ink composition This also has an advantageous effect that the meniscus can be stably formed.

  On the other hand, when the reduced portion 3 whose diameter changes discontinuously exists in the nozzle hole 2, the streamline tends to be disturbed when the ink composition flows in the reduced portion 3. Therefore, when bubbles are generated in the ink composition, the bubbles are likely to stay near the staying portion 5 in the example of FIG. Thereby, the ejection stability of the ink composition may be impaired. However, since the ink composition according to the present embodiment can suppress the generation of bubbles in the ink composition or can eliminate the bubbles even if bubbles are generated, a recording head having such a shape of the nozzle hole Even in this case, the effect of enhancing the ejection stability of the ink composition becomes remarkable.

(Ink container)
The ink composition according to this embodiment can be stored in an ink storage container. The ink container of the present embodiment includes an ink inlet that can be replenished with an ink composition. Two embodiments of the ink container are illustrated below.

(1) First Embodiment An example of an ink storage container 21 according to the first embodiment and an ink jet recording apparatus (hereinafter also referred to as “printer”) that uses an ink composition supplied from the ink storage container 21 is described with reference to the drawings. While explaining.

  FIG. 2 is a perspective view of the ink jet recording apparatus 11 to which the ink container 21 according to the first embodiment is mounted. FIG. 3 is a perspective view showing the ink container 21 of the present embodiment with the slider 34 separated. FIG. 4 is an exploded perspective view of the ink container 21 of the present embodiment. FIG. 5 is a diagram schematically illustrating a side surface of the ink container 21 of the present embodiment in a state where the film 133 is bonded to the container case 130.

As shown in FIG. 2, the ink jet recording apparatus 11 of the present embodiment includes a leg portion 13 with a wheel 12 attached to the lower end, and a substantially rectangular parallelepiped apparatus main body 14 assembled on the leg portion 13. In the present embodiment, the direction along the direction of gravity is defined as the vertical direction Z, and the longitudinal direction of the apparatus main body 14 intersecting with the vertical direction Z (orthogonal in the present embodiment) is defined as the horizontal direction X. Also, a direction that intersects (orthogonal in the present embodiment) both the vertical direction Z and the horizontal direction X is defined as the front-rear direction Y.

  As shown in FIG. 2, a feeding portion 15 that protrudes upward is provided at the rear portion of the apparatus main body 14. In the feeding unit 15, a roll paper R on which a paper S as a long medium is wound in a cylindrical shape is loaded. In the housing portion 16 constituting the exterior of the apparatus main body 14, an insertion port 17 for introducing the paper S fed from the feeding portion 15 into the housing portion 16 is formed at a position on the front side of the feeding portion 15. Has been.

  On the other hand, a discharge port 18 for discharging the paper S to the outside of the housing unit 16 is formed on the front side of the apparatus main body 14. Note that a medium transport mechanism (not shown) that transports the sheet S fed from the feeding unit 15 from the insertion port 17 side to the discharge port 18 side is accommodated in the housing unit 16. A medium receiving unit 19 that receives the paper S discharged from the discharge port 18 is provided at a position below the discharge port 18 on the front side of the apparatus main body 14.

  In addition, an operation panel 20 for performing a setting operation and an input operation is provided on one end side (the right end side in FIG. 2) outside the transport path of the sheet S in the left-right direction X in the upper part of the apparatus main body 14. Yes. Furthermore, an ink storage container 21 that can store an ink composition is fixed to the lower end of the apparatus main body 14 at one end side (the right end side in FIG. 2) that is outside the transport path of the paper S in the left-right direction X. .

  A plurality (four in this embodiment) of ink storage containers 21 are provided corresponding to the type and color of the ink composition. The ink storage unit 22 is configured by arranging the plurality of ink storage containers 21 so as to be arranged in the left-right direction X. The ink storage unit 22 has a portion exposed to the front side (outside side) of the apparatus main body 14 in a state where each ink storage container 21 is fixed to the apparatus main body 14. The ink containing unit 22 is covered with a frame member 23 having a substantially U-shaped cross section fixed to the apparatus main body 14 side on both sides in the left-right direction X and the lower side in the up-down direction Z of the exposed portion.

  In addition, a carriage 25 on which the recording head 24 is mounted is accommodated in the housing unit 16 so as to be capable of reciprocating in the left-right direction X, which is the main scanning direction. Note that an ink supply mechanism (not shown) for supplying the ink composition stored in the ink storage container 21 toward the recording head 24 is stored in the housing portion 16. Then, recording (printing) is performed by ejecting droplets of the ink composition from the recording head 24 onto the paper S conveyed by the medium conveying mechanism, and the ink container is ejected through ejection of the droplets of the ink composition. The ink in 21 is consumed. In the present embodiment, the state in which the ink storage container 21 is attached to the frame member 23 of the ink jet recording apparatus 11 and fixed so as not to move relative to the ink jet recording apparatus 11 is the posture state when the ink storage container 21 is used. It becomes.

  As shown in FIG. 3, the ink storage container 21 of the present embodiment is disposed so as to overlap an ink storage body 33 that stores ink and an upper side that is the antigravity direction in the vertical direction with respect to the ink storage body 33. The slider 34 is provided.

In the ink container 33, a direction perpendicular to the longitudinal direction of the apparatus main body 14 in the substantially horizontal direction is defined as the longitudinal direction (front-rear direction Y), and a constant width is provided in the lateral direction (lateral direction X) perpendicular to the substantially horizontal direction. It has a rectangular parallelepiped shape having a substantially L shape in side view. In other words, the ink container 33 has a first container part 37 having a substantially square side surface when viewed from the short side direction (left-right direction X), and a front-rear direction on the rear side of the first container part 37. Y has a second accommodating body portion 38 having a substantially rectangular shape. Further, on the upper surface 39 of the ink containing body 33, flat surface portions 41 and 42 extending continuously in the longitudinal direction (front-rear direction Y) without any step are formed at both ends in the lateral direction, and along the flat surface portions 41 and 42, respectively. The slider 34 is slidable. On the other hand, the lower surface 40 of the ink containing body 33 has a shape in which the first containing body portion 37 has a stepped surface that is lower than the second containing body portion 38 in the longitudinal direction (front-rear direction Y).

  As shown in FIG. 3, the slider 34 is an ink for injecting ink into the ink containing body 33 on the upper surface 39 of the ink containing body 33 in the first portion of the ink containing body 33 located outside the inkjet recording apparatus 11. An inlet 73 is provided. In the present embodiment, the first container body 37 corresponds to the first part, and the ink injection port 73 is provided in the first container body 37. In addition, the ink injection port 73 positioned so as to be operable from the outside of the ink jet recording apparatus 11 is configured to be covered by the slider 34 so that it is not exposed except when ink is injected.

  That is, the slider 34 has a substantially rectangular shape having a longitudinal direction, and has an outer shape that substantially overlaps the upper surface 39 of the ink containing body 33. When the slider 34 is disposed in a state where one end side thereof is inserted into the frame member 23 so as to substantially overlap the upper surface 39 of the ink container 33, the ink of the ink provided in the ink container 33 is provided. The upper part of the inlet 73 is covered with an openable / closable cover 74. Specifically, the slider 34 is provided with an open / close cover 74 that is displaced between a position where the ink injection port 73 is covered and a position where the slider is opened at the end in the longitudinal direction. In the following description, “insertion direction” refers to the “insertion direction” of the slider 34 with respect to the frame member 23 unless otherwise specified.

  In the present embodiment, the open / close cover 74 is in the short side direction of the ink container 33 at a position closer to the second container part 38 (second portion) than the ink inlet 73 in a state of covering the ink inlet 73. The slider 34 is pivotally supported so that the axis extending along the axis is the center of rotation. Therefore, as shown by a two-dot chain line in FIG. 3, when opening the ink injection port 73, the user lifts the front side of the opening / closing cover 74, which is the front end side in the longitudinal direction of the slider 34, to the second container. It can be rotated about 180 degrees to the ink jet recording apparatus 11 side which is the portion 38 side.

  As a result, the opening / closing cover 74 is changed from the covering state of the ink injection port 73 shown by the solid line in FIG. 3 to the open state of the ink injection port 73 as shown by the two-dot chain line in FIG. On the other hand, it can be displaced so as to be positioned on the rear side. In the present embodiment, the ink injection port 73 is provided in the vicinity of the front end portion of the first storage body portion 37 of the ink storage body 33, and the front-rear direction Y required for the open / close cover 74 to cover the ink injection port 73. The length of is not long.

  In the example of the ink container 21 shown in FIG. 3, in addition to the above configuration, the connection portion 43 related to the connection with the inkjet recording apparatus 11, the recording chip 75 as an example of the storage portion, and the chip holder as an example of the storage portion holding member 76, a projecting portion 80 provided on the chip holder 76, a protruding portion 82 for sliding operation of the slider 34, a protruding portion 93, a recessed portion 95, a finger hook portion 96, and the like are drawn. Of course, the configuration or shape of the ink container 21 of the present embodiment is not essential, and may further include an appropriate configuration as necessary.

Next, the internal configuration of the ink container 33 will be described. As shown in FIG. 4, the ink container 33 includes a container case 130 that is substantially L-shaped when viewed from the left-right direction X, and a float valve 131 that is a type of valve mechanism that is housed in the container case 130. A film 133 that is bonded (for example, heat-sealed) to the case opening 132 of the housing case 130, and a resin cover 134 that covers the case opening 132 over the film 133. The housing case 130 is integrally molded so that the right side surface is opened, and the locking portion 130a for locking the claw portion 134a formed on the cover 134 is formed outside the case opening portion 132 forming an annular shape. Is formed.

  As shown in FIG. 5, when the film 133 is adhered to the case opening 132 of the container case 130, the space enclosed by the container case 130 and the film 133 has an air chamber 136 that communicates with the atmosphere, and ink. Functions as an ink chamber 137 as an example of a liquid storage chamber for storing liquid and a discharge channel 138 as an example of a liquid channel. The outlet channel 138 has one end communicating with the ink chamber 137, and the other end has an outlet for leading the ink stored in the ink chamber 137 to the recording head 24 (inkjet recording apparatus 11 side). Is formed.

  As shown in FIG. 5, in the shape of the ink chamber 137, the height dimension in the vertical direction Z on the front side is larger than the height dimension in the vertical direction Z on the rear side, similarly to the shape of the ink container 33. Further, the ink chamber 137 includes a first ink chamber as an example of a first liquid storage chamber by a partition wall 150 that intersects a ceiling surface 137b as an example of an injection port formation surface on which the ink injection port 73 in the ink chamber 137 is formed. 151 and a second ink chamber 152 as an example of a second liquid storage chamber.

  The partition wall 150 is provided so as to extend along the vertical direction Z, and also intersects with a facing surface (bottom surface) 153 facing the ceiling surface 137b. Further, the width of the partition wall 150 in the left-right direction X is substantially equal to the width from the left side wall 130 b of the housing case 130 to the case opening 132. Further, the partition wall 150 is orthogonal to the side wall 130b of the container case 130 at a position closer to the front side in the ink chamber 137 where the height in the vertical direction Z is large, and from the side wall 130b to the case opening 132 side (in FIG. 5). The container case 130 is integrally formed so as to protrude toward the front side. Therefore, the height of the second ink chamber 152 in the vertical direction Z on the first ink chamber 151 side is substantially equal to the height of the first ink chamber 151 in the vertical direction Z, and further on the rear side away from the first ink chamber 151. It is larger than the height in the vertical direction Z. The volume of the first ink chamber 151 is smaller than the volume of the second ink chamber 152.

  The first ink chamber 151 and the second ink chamber 152 communicate with each other through the wall ventilation opening 156. Therefore, since the pressures in the first ink chamber 151 and the second ink chamber 152 are substantially the same, the ink levels in the first ink chamber 151 and the second ink chamber 152 are substantially the same in the vertical direction Z. To rise.

  As shown in FIG. 5, the second ink chamber 152 has at least one (9 in this embodiment) intersecting rib portions 157a to 157i that intersect with the ceiling surface 137b and extend in the vertical direction Z. , With a gap in the front-rear direction Y. Further, in the second ink chamber 152, at least one (four in this embodiment) laterally inclined rib portions 158a to 158d intersecting the vertical direction Z and the front-back direction (horizontal direction) Y are provided. Is formed. These intersecting rib portions 157a to 157i and transverse oblique rib portions 158a to 158d are orthogonal to the side wall 130b of the housing case 130 and face the case opening 132 side (front side in FIG. 5) from the side wall 130b. The container case 130 is integrally molded so as to protrude.

As shown in FIGS. 4 and 5, the first laterally inclined rib portion 158a at the highest position is formed so as to be a downward slope toward the rear from the intersection of the partition wall 150 and the ceiling surface 137b. . Further, the second oblique rib portion 158b at the second highest position descends more slowly than the first oblique rib portion 158a from the lower position to the rear of the partition wall 150 than the first oblique rib portion 158a. It is formed to be a slope. That is, the first laterally inclined rib portion 158a and the second laterally inclined rib portion 158b are formed so as to intersect with the partition wall 150 and intersect with the front-rear direction Y. The first laterally inclined rib portion 158a and the second laterally inclined rib portion 158b have a width in the left-right direction X that is smaller than the width of the partition wall 150 and the intersecting rib portions 157a to 157i. Therefore, when the film 133 is bonded to the case opening 132, a gap is formed between the first transverse oblique rib portion 158a and the second transverse oblique rib portion 158b and the film 133. Therefore, the space divided by the first laterally inclined rib portion 158a and the second laterally inclined rib portion 158b communicates with each other through the gap.

  Further, on the bottom surface 152a side of the second laterally inclined rib portion 158b and on the upper side of the float valve 131, as an example of the third laterally inclined rib portion 158c and an example of the second flange portion, The fourth laterally inclined rib portion 158d is formed. The third oblique rib portion 158c is formed between the partition wall 150 and the first intersecting rib portion 157a, and the fourth oblique rib portion 158d is formed on the rear side of the second intersecting rib portion 157b. Has been. The third oblique rib portion 158c and the fourth oblique rib portion 158d are symmetrical with respect to an axis (not shown) along the direction of gravity passing through the center of the float valve 131, and from the center of the float valve 131. It forms so that it may become a downward slope each to an edge part. That is, the distance between the upper end of the third horizontal oblique rib portion 158c and the upper end of the fourth horizontal oblique rib portion 158d is shorter than the distance between the lower end of the third horizontal oblique rib portion 158c and the lower end of the fourth horizontal oblique rib portion 158d.

  The third laterally inclined rib portion 158c and the fourth laterally inclined rib portion 158d have substantially the same width in the left-right direction X as the width of the partition wall 150. Furthermore, both ends of the third laterally inclined rib portion 158c and the fourth laterally inclined rib portion 158d are recessed toward the side wall 130b. Therefore, when the film 133 is adhered to the adhesion surface (right end surface) of the third laterally inclined rib portion 158c and the fourth laterally inclined rib portion 158d, the recessed portion formed on the side wall 130b side is a rib through which ink can pass. It functions as the communication opening 161. Accordingly, the space divided by the third laterally inclined rib portion 158c and the fourth laterally inclined rib portion 158d communicates with each other through the rib communication opening 161.

  Further, rib ventilation openings 160 are formed in the intersecting rib portions 157a to 157i, respectively. Therefore, the pressures in the spaces on both sides of the intersecting rib portions 157a to 157i in the second ink chamber 152 are substantially the same. Therefore, the liquid level of the ink in the second ink chamber 152 also rises so as to be substantially the same height in the vertical direction Z.

  As shown in FIG. 5, the outlet channel 138 is formed below the second ink chamber 152 along the bottom surface 152 a of the second ink chamber 152. The lead-out flow path 138 is formed so as to be bent in accordance with the shape of the ink container 33, and is bent so that the ink composition flows while changing the direction in which the ink composition flows (hereinafter referred to as "flow direction"). A flow path portion 163 is provided. Further, the outlet channel 138 includes a connecting channel portion 164 that connects the second ink chamber 152 and the bent channel portion 163, and an inclined channel portion 165 that connects the bent channel portion 163 and the outlet port 69.

  The bent flow path portion 163 has at least one (two in the present embodiment) vertical flow path portions 163a and 163b extending along the vertical direction Z, and a plurality of (both are formed at both ends of the vertical flow path portions 163a and 163b. In this embodiment, four bent portions 173a to 173d and a transverse flow path portion 163c extending along the front-rear direction Y are provided.

(2) Second Embodiment An ink container 200 according to a second embodiment will be described with reference to the drawings.

FIG. 6 is a cross-sectional view schematically showing the ink container 200 according to the second embodiment. The ink container 200 is connected to the recording head 300 by an ink supply path 400.

  The ink storage container 200 includes an ink storage chamber 214 having an air introduction port 212, and air is introduced from the air introduction port 212 into the ink composition stored in the ink storage chamber 214. Bubbles are generated in the. Further, the ink container 200 has a structure in which the atmosphere and the ink composition can come into contact with each other. In addition, in a state where ink is stored in the ink storage chamber 214 so that bubbles are generated in the ink composition by introducing air from the air inlet 212, the ink composition and the air inlet 212 are You may have the structure which touches.

  Although not shown, the ink jet recording apparatus can have a plurality of ink containers 200. The ink supply path 400 can be formed of a flexible member such as synthetic rubber, and can be a hose or a tube.

  The ink composition supply method shown in FIG. 6 is based on the principle of the Marriott bottle, in short, and the recording head 300 and the ink storage container 200 are connected via the ink supply path 400 and the ink storage container. The ink composition is sucked and supplied from 200 to the recording head 300.

  FIG. 6 shows a state in which the ink container 200 is mounted in the ink jet recording apparatus in a use state. The ink jet recording apparatus is installed on the horizontal plane sf. Note that “the ink jet recording apparatus is in use” means that the ink composition is ejected onto the medium and can be normally attached, and is not necessarily in a state where it is installed on a horizontal plane. The ink outlet 216 of the ink container 200 and the recording head 300 are connected via an ink supply path 400.

  The outer surface of the ink container 200 includes a first wall 270C1, a second wall (upper wall) 270C2, and a bottom wall 270C3. The ink container 200 has an air introduction channel and an ink channel inside thereof. The air introduction channel is a channel for introducing air from the atmosphere opening port 217 through the atmosphere introduction port 218 via an atmosphere channel (not shown) to the ink storage chamber 214. The ink flow path ink inlet 204 is an opening having an opening / closing mechanism for filling the ink composition from the ink flow path ink inlet 204 into the ink containing chamber 214.

  The air introduction channel is a channel used in the above-described air introduction operation. The air introduction channel includes an atmosphere opening port 217 that opens toward the outside (atmosphere), an air storage chamber 230 that has the atmosphere introduction port 218 as one end and the air chamber side opening 251 as the other end, and an air chamber side opening 251. And an ink chamber communication path 250 having the air inlet 212 as the other end. The atmosphere opening port 217 communicates with the atmosphere, the air storage chamber 230 opens at the atmosphere introduction port 218 at one end, and the atmosphere opening port 217 and the atmosphere introduction port 218 communicate with each other via a channel (not shown). That is, the air accommodating chamber 230 communicates with the outside (atmosphere). In the ink chamber communication path 250, an air chamber side opening 251, which is one end, opens at the air accommodation chamber 230, and an air introduction port 212, which is the other end, opens at the ink accommodation chamber 214. That is, the air storage chamber 230 communicates with the ink storage chamber 214. The ink chamber communication path 250 preferably has a flow path cross-sectional area small enough to form a meniscus (liquid level cross-linking).

As described above, in the air introduction flow path, the air introduction port 212 that is one end opens in the ink storage chamber 214, and the atmosphere opening port 217 that is the other end opens toward the outside. In other words, when the ink container 200 is in use, a liquid level that is in direct contact with the atmosphere is formed in the ink chamber communication path 250 (specifically, in the vicinity of the air inlet 212). The air (bubbles G) is introduced into the ink storage chamber 214 by introducing air (bubbles) into the ink. As a result, the ink composition can be stably supplied from the ink container 200 to the recording head 300.

  These ink supply operations are performed as the ink storage amount of the ink container 200 is reduced due to the ejection operation from the recording head 300, and are stably performed by the air introduction operation.

  The ink container 200 has a use state and an injection state. The “use state” is a state of the ink container 200 in the use state of the ink jet recording apparatus. When the ink container 200 is used, the ink injection port 204 is open in the horizontal direction (here, the opening is closed by the plug member 202). FIG. 6 shows the ink container 200 in the use state. In use, the ink storage chamber 214 and the air storage chamber 230 are aligned in the horizontal direction. Further, in the use state, the air inlet 212 is positioned below the liquid surface of the ink composition stored in the ink storage chamber 214.

  On the other hand, the “injection state” of the ink container 200 is a state in which the ink injection port 204 is installed so as to open upward. In the injection state, the ink storage chamber 214 and the air storage chamber 230 are aligned in the vertical direction. Further, in the injecting state, the air introduction port 212 is such that the liquid level of the ink composition accommodated in the ink accommodating chamber 214 in the in-use state is on the straight line LM1 (“first state display line LM1” (see FIG. 6)). When the amount of liquid at that time is stored in the ink storage chamber 214, it is located above the liquid surface of the ink composition stored in the ink storage chamber 214.

  In the injection state of the ink container 200, the user reaches the vicinity of the straight line LM2 ("second state display line LM2" (see FIG. 6)) in which the liquid level of the ink composition is horizontal in the injection state. The ink filling may be stopped. After the ink composition is injected from the ink injection port 204 into the ink storage chamber 214 in this way, the ink injection port 204 is sealed with the plug member 202. Further, when the ink in the ink storage chamber 214 is sucked from the recording head 300, the ink storage chamber 214 becomes negative pressure.

  In the use state of the ink container 200, the air inlet 212 is positioned below the first state display line LM1. In FIG. 6, the air introduction port 212 is formed in the bottom wall 270 </ b> C <b> 3 positioned below the ink storage chamber 214 in the use state in the container main body 211 that defines the ink storage chamber 214. As a result, even if the ink in the ink storage chamber 214 is consumed and the liquid level of the ink composition in the ink storage chamber 214 is lowered, the liquid level (atmospheric contact liquid level) LA in contact with the atmosphere is long (the ink composition). Is maintained at a constant height over a period of time until the liquid level reaches the first state display line LM1. Further, in the use state, the air inlet 212 is disposed so as to be lower in the vertical direction than the position where the nozzle hole (not shown) of the recording head 300 is formed.

  When the ink composition is sucked by the recording head 300, a negative pressure is generated, and when the predetermined negative pressure is reached, the ink composition in the ink storage chamber 214 is supplied to the recording head 300 via the ink supply path 400.

  When the ink in the ink storage chamber 214 is consumed, the air in the air storage chamber 230 is introduced into the ink storage chamber 214 as bubbles G through the ink chamber communication path 250. As a result, the ink level LF in the ink storage chamber 214 is lowered. On the other hand, the height of the atmospheric contact liquid level LA in contact with the atmosphere is maintained constant.

<Inkjet recording method>
The ink composition according to the present embodiment can be suitably used in an ink jet recording method for recording the above-described ink composition on a recording medium such as paper or fabric. In addition, since the ink composition according to the present embodiment contains a disperse dye, it can be particularly suitably used for a dyeing method (sublimation transfer ink jet recording method) for a fabric or the like using sublimation transfer.

  As a dyeing method using sublimation transfer, for example, there is a method of performing printing by an inkjet method using an ink composition containing a sublimation dye on a sheet-like intermediate transfer medium (first recording medium) such as paper. More preferably, there is a method in which the intermediate transfer medium printed as described above is superimposed on a recording medium (second recording medium) such as a cloth, and sublimation transfer is performed by heating.

  The sublimation transfer ink jet recording method includes a step of attaching an ink composition to a recording surface of a first recording medium, a step of disposing a second recording medium on the recording surface of the first recording medium, the first recording medium, and the second recording medium. Heating the recording medium. In other words, a sublimation transfer ink jet recording method (a method for producing a dyed product) includes an ink application step of applying an ink composition as described above to an intermediate transfer medium using an ink jet method, and an intermediate in which the ink composition is applied. The transfer medium is heated in a state where the surface to which the ink composition is applied and the dyed surface of the object to be dyed are opposed to each other, thereby transferring the disperse dye to the object to be dyed. Thereby, the manufacturing method of the dyeing | staining thing using the ink composition which can manufacture dyeing | staining with high productivity can be provided. Hereinafter, each step will be described.

(Ink application process)
In this step, the ink composition is applied to the recording surface of the intermediate transfer medium (first recording medium) using an inkjet method. The ink composition can be discharged by an ink jet method using a droplet discharge device (for example, an ink jet recording device described later).

As a droplet discharge method (inkjet method), a piezo method, a method of discharging ink by bubbles generated by heating the ink, or the like can be used. However, it is difficult to change the quality of the ink composition. From the viewpoints of the above, the piezo method is preferable. Further, according to the inventors' investigation, it has been found that in a thin film piezoelectric recording head, the share rate applied to the ink composition is about 100 s ^−1, which is more preferable in the ink composition according to the present embodiment. Share rate.

  As the intermediate transfer medium, for example, paper such as plain paper, a recording medium provided with an ink receiving layer (referred to as exclusive ink jet paper, coated paper, etc.), etc. can be used. More preferred is a paper provided with an ink receiving layer containing. Accordingly, an intermediate recorded matter in which bleeding or the like is suppressed on the recording surface can be obtained in the process of drying the ink composition applied to the intermediate transfer medium. Moreover, with such a medium, the disperse dye can be easily retained on the surface of the recording surface, and the sublimation of the disperse dye can be performed more efficiently in the subsequent transfer step.

  In this step, a plurality of types of ink compositions may be used. Thereby, for example, the color gamut that can be expressed can be made wider.

(Transfer process)
Thereafter, the ink composition is heated in a state where the recording surface of the intermediate transfer medium to which the ink composition is applied is opposed to the object to be dyed (a state where the second recording medium is disposed on the recording surface of the first recording medium). The disperse dye which comprises is transferred to a to-be-dyed material. Thereby, the dyeing | staining thing used as to-be-dyed objects, such as a cloth, is obtained.

  The heating temperature in this step is not particularly specified, but is preferably 160 ° C or higher and 220 ° C or lower, more preferably 170 ° C or higher and 210 ° C or lower, and particularly preferably 170 ° C or higher and 200 ° C or lower. is there. Thereby, sufficient energy can be given to transfer the disperse dye to the article to be dyed, and the productivity of the dyed article can be improved.

  Although depending on the heating temperature, the heating time in this step is 30 seconds to 90 seconds, preferably 40 seconds to 70 seconds, and particularly preferably 45 seconds to 60 seconds. Thereby, energy sufficient to transfer the disperse dye to the object to be dyed can be obtained, and the productivity of the dyed object can be made particularly excellent.

  In addition, this step may be performed by heating the intermediate transfer medium to which the ink composition is applied while facing the object to be dyed, but in a state where the intermediate transfer medium and the object to be dyed are in close contact with each other. It is more preferable to carry out by heating. Thereby, for example, a clearer image can be recorded (stained) on the second recording medium.

  As the material to be dyed, for example, a sheet-like material such as a cloth (hydrophobic fiber cloth or the like) or a resin (plastic) film is preferably used, but a three-dimensional shape such as a spherical shape or a rectangular parallelepiped shape other than the sheet shape is used. You may use what has.

  Further, as the object to be dyed, for example, glass, metal, ceramics may be used in addition to those made of resin and plastic. Examples of the fibers constituting the fabric as the object to be dyed include polyester fibers, nylon fibers, triacetate fibers, diacetate fibers, polyamide fibers, and blended products using two or more of these fibers. Moreover, you may use the blended products of these with regenerated fibers, such as rayon, or natural fibers, such as cotton, silk, and wool.

  Examples of the resin (plastic) film as the object to be dyed include a polyester film, a polyurethane film, a polycarbonate film, a polyphenylene sulfide film, a polyimide film, and a polyamideimide film. The resin (plastic) film may be a laminate in which a plurality of layers are laminated, or may be composed of a gradient material in which the composition of the material changes in a gradient manner.

  According to such a sublimation transfer ink jet recording method, since the ink composition according to the present embodiment is used, the generation of bubbles is suppressed, or even if bubbles are generated, the defoaming can be performed, so that the ejection stability is improved. .

2. EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples. In the examples and comparative examples, “parts” and “%” are based on mass unless otherwise specified.

2.1. Preparation of ink composition Each component was put into a container so as to have the composition shown in Table 1, mixed and stirred for 2 hours with a magnetic stirrer, and further into a bead mill filled with zirconia beads having a diameter of 0.3 mm. And mixed well by carrying out a dispersion treatment. After stirring for 1 hour, each ink composition according to Examples and Comparative Examples was obtained by filtering using a 5 μm PTFE membrane filter. The numerical values in Table 1 indicate mass%, and pure water (ion exchange water) was added so that the mass of each ink composition was 100 mass%.

2.2. Evaluation Test (1) Ink Storage Stability Test I (Evaluation of foreign matter derived from disperse dye)
Each ink composition obtained above was put into a 50 cc glass bottle so as to be completely filled and sealed, and then these glass bottles were placed in a constant temperature bath at 60 ° C. and left for 5 days. After 5 days, the glass bottle was taken out and sufficiently shaken, and 10 mL of the ink composition was collected and filtered with a metal filter having a pore diameter of 10 μm. The number of foreign matters present on the filter was counted using an optical microscope. The foreign matters seen here are those in which the disperse dye is dissolved and reprecipitated in the components in the ink composition, and are observed as needle-like foreign matters. The evaluation criteria are as follows.
<Evaluation criteria>
A: Number of foreign matter is 9 or less B: Number of foreign matter is 10 or more and 49 or less C: Number of foreign matter is 50 or more

(2) Ink storage stability test II (Evaluation of foreign matter originating from gas-liquid interface)
After 40 g of each ink composition obtained above was put in a 50 cc glass bottle and sealed, these glass bottles were put in a 60 ° C. thermostat and left for 5 days. After 5 days, the glass bottle was taken out and sufficiently shaken, and 10 mL of the ink composition was collected and filtered with a metal filter having a pore diameter of 10 μm. The number of foreign matters present on the filter was counted using an optical microscope. The foreign matter seen here is generated at the gas-liquid interface and is observed as foreign matters of various shapes. The evaluation criteria are as follows.
<Evaluation criteria>
A: Number of foreign matter is 9 or less B: Number of foreign matter is 10 or more and 49 or less C: Number of foreign matter is 50 or more

(3) Ejection stability test An ink container was prepared by filling the ink cartridge of each example described in Table 1 in a dedicated cartridge of the ink jet recording apparatus PX-H6000 (manufactured by Seiko Epson Corporation). Next, this ink container was mounted on the magenta row of the ink jet recording apparatus PX-H6000. The ink container used for the evaluation is provided with an ink inlet that can be replenished with the ink composition, and the nozzle holes of the ink jet recording apparatus PX-H6000 are arranged in the ink composition ejection direction as shown in FIG. The vertical cross-sectional area has a shape having a portion that discontinuously decreases in the ink composition ejection direction.

In each of the examples and comparative examples, the ink composition was ejected onto a B0 size photographic paper <glossy> (manufactured by Seiko Epson Corporation) (PGPP) to thereby obtain 10 sheets of printed matter on which a solid pattern image was printed. Created continuously. Then, the number of missing nozzles in this image was examined. The missing nozzles generated here are missing nozzles derived from the above-mentioned foreign matters derived from the disperse dye or foreign matters derived from the gas-liquid interface, blocking the nozzle holes or the filters in the flow paths, or from bubbles mixed in the nozzle holes. The evaluation criteria are as follows.
<Evaluation criteria>
A: 0 to 10 B: 11 to 20 C: 21 or more

2.3. Evaluation Results The compositions and evaluation results of the ink compositions of each Example and each Comparative Example are shown in Table 1 below. In Table 1 below, the numerical value of each component represents mass%.

In Table 1 above, the abbreviations and the like of the components are as follows.
<Disperse dye>
DR60: C.I. I. Disperse thread 60, manufactured by Nippon Kayaku Co., Ltd., DB359: C.I. I. Disperse Blue 359, manufactured by Nippon Kayaku Co., Ltd. <Dispersant>
・ Demol EP: trade name, polycarboxylic acid type polymer surfactant, manufactured by Kao Corporation, solid content 25%, weight average molecular weight 7,000 to 8,000
Aron A-6330: trade name, sodium polycarboxylate, manufactured by Toagosei Co., Ltd., solid content 40%, weight average molecular weight 10,000
<Anionic surfactant>
・ Latemul WX: trade name, sodium polyoxyethylene alkyl ether sulfate, manufactured by Kao Corporation, solid content 26%
<Nonionic surfactant>
Surfynol DF110D: trade name, 2,5,8,11-tetramethyl-6-dodecin-5,8-diol, manufactured by Nissin Chemical Industry Co., Ltd., HLB value = 3
Surfynol 104: trade name, 2,4,7,9-tetramethyl-5-decyne-4,7-diol, manufactured by Nissin Chemical Industry Co., Ltd., HLB value = 4
Surfynol 440: trade name, 2,4,7,9-tetramethyl-5-decyne-4,7-diol ethylene oxide adduct, manufactured by Nissin Chemical Industry Co., Ltd., HLB value = 8
KF-945: trade name, polyether-modified dimethylsiloxane, manufactured by Shin-Etsu Silicone Co., Ltd., HLB value = 4
<Solvent>
MTG: Triethylene glycol monomethyl ether

  From the results of Table 1, according to the ink compositions for inkjet recording of Examples 1 to 7, the generation of needle-like foreign matters derived from disperse dyes and foreign matters at the gas-liquid interface is reduced, and the shape of the nozzle holes is the discharge of bubbles. It was also found that even if the shape is disadvantageous for movement, nozzle omission derived from bubbles is also reduced. On the other hand, the ink composition for inkjet recording of Comparative Example 1 contains a nonionic surfactant (HLB value = 8) and thus cannot inhibit the generation of bubbles, and the nozzle omission derived from bubbles does not occur. Many were recognized. The ink composition for ink jet recording of Comparative Example 2 contained too little nonionic surfactant (HLB value = 3), so it was not possible to inhibit the generation of bubbles, and many nozzle omissions derived from bubbles were observed. . The ink composition for ink jet recording of Comparative Example 3 has too much nonionic surfactant (HLB value = 3), so that the disperse dye is dissolved in the ink composition, and the needle derived from the disperse dye. Many occurrences of particulate foreign matter were observed. From the above results, according to the ink composition for ink jet recording according to the present invention, even when the ink composition is contained in an ink containing container having a shape that easily comes into contact with the atmosphere, the generation of foreign matters and bubbles is suppressed. It was revealed that the storage stability and the ejection stability were improved.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the present invention includes substantially the same configuration (for example, a configuration having the same function, method and result, or a configuration having the same purpose and effect) as the configuration described in the embodiment. In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that exhibits the same operational effects as the configuration described in the embodiment or a configuration that can achieve the same object. In addition, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

DESCRIPTION OF SYMBOLS 1 ... Nozzle plate, 2 ... Nozzle hole, 3 ... Reduction part, 4 ... Discharge direction, 5 ... Residence part, 11
DESCRIPTION OF SYMBOLS ... Inkjet recording device, 12 ... Wheel, 13 ... Leg part, 14 ... Apparatus main body, 15 ... Feeding part, 16 ... Housing | casing part, 17 ... Insertion port, 18 ... Discharge port, 19 ... Medium receiving unit, 20 ... Operation Panel, 21 ... Ink container, 22 ... Ink container unit, 23 ... Frame member, 24 ... Recording head, 25 ... Carriage, 33 ... Ink container, 34 ... Slider, 37 ... First container part, 38 ... Second Container unit 39 ... upper surface 40 ... lower surface 41 and 42 flat surface part 43 ... connection part 69 ... outlet port 73 ... ink injection port 74 ... open / close cover 75 ... recording chip 76 ... chip holder, 80 ... Projection site, 82 ... Projection strip, 93 ... Projection, 95 ... Concavity, 96 ... Finger hook, 130 ... Housing case, 130a ... Locking portion, 130b ... Side wall, 131 ... Float valve, 132 ... Case Opening, 1 DESCRIPTION OF SYMBOLS 3 ... Film, 134 ... Cover, 134a ... Claw part, 136 ... Air chamber, 137 ... Ink chamber, 137b ... Ceiling surface, 138 ... Derivation flow path, 150 ... Partition wall, 151 ... First ink chamber, 152 ... Second Ink chamber, 152a ... bottom surface, 153 ... opposite surface, 156 ... wall ventilation openings, 157a-i ... cross rib portions, 158a-d ... first to fourth oblique rib portions, 160 ... rib ventilation openings, 161 ... rib communication Opening, 163... Bent flow portion, 163a and 163b... Longitudinal flow channel portion, 163c... Transverse flow channel portion, 164... Connection flow channel portion, 165. 202 ... Plug member, 204 ... Ink injection port, 211 ... Container body, 212 ... Air introduction port, 214 ... Ink storage chamber, 216 ... Ink outlet, 217 ... Air release port, 218 ... Air introduction port, 230 ... Air 250, ink chamber communication path, 251 ... air chamber side opening, 270C1, first wall, 270C2, second wall, 270C3, bottom wall, 300 ... recording head, 400 ... ink supply path, R ... roll paper, S ... paper, sf ... horizontal plane, G ... bubble

Claims (10)

A disperse dye, a polycarboxylic acid-based polymer surfactant, an anionic surfactant, and a nonionic surfactant having an HLB value of 5 or less,
An ink composition for ink jet recording, wherein the content of the nonionic surfactant is 0.01% by mass or more and 0.7% by mass or less with respect to the total mass of the ink composition.   The ink composition for inkjet recording according to claim 1, wherein the disperse dye is a disperse dye having a molecular weight of 380 or less and having a sublimation property.   The ink composition for ink jet recording according to claim 1 or 2, wherein the anionic surfactant is sodium polyoxyethylene alkyl ether sulfate.   The ink composition for inkjet recording according to any one of claims 1 to 3, wherein the nonionic surfactant is acetylene glycol having a main chain having 10 or more carbon atoms.   The acetylene glycol is 2,5,8,11-tetramethyl-6-dodecin-5,8-diol, 5,8-dimethyl-6-dodecyne-5,8-diol, 2,4,7,9- 5. The ink jet recording according to claim 4, which is at least one selected from the group consisting of tetramethyl-5-decyne-4,7-diol and 4,7-dimethyl-5-decyne-4,7-diol. Ink composition.   The inkjet according to any one of claims 1 to 5, comprising the anionic surfactant and the nonionic surfactant in an amount ratio of 1: 0.02 to 1: 1 on a mass basis. A recording ink composition.   The ink composition for inkjet recording according to any one of claims 1 to 6, wherein the ink composition is used in an ink storage container. An ink storage container for storing the ink composition according to any one of claims 1 to 7,
An ink container, wherein the ink container has a gas-liquid interface.   An ink jet recording method for recording by discharging the ink composition according to any one of claims 1 to 7 from a recording head.   The recording head has a nozzle hole for discharging the ink composition, and the nozzle hole has a portion in which a cross-sectional area perpendicular to the discharge direction of the ink composition decreases discontinuously toward the discharge direction. The inkjet recording method according to claim 9.

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